Spinning bucket cover-retaining device



J m- 2,1 3- H. J. MCDERMCTT 2,' 3 0 8 ,382

SPINNING BUCKET COVER-RETAINING DEVICE Filed Nov. 5,. 1941 F 5 I INVENTOR.

HEN}? YJ MEEEFJMUTT ATTORNE the limits defined by such perforation being Patented Jan. 12, 1943 FFICE 2,308,382 I SPINNING BUCKET, COVER-RETAINING DEVICE Henry J. McDermott,

Prospect Park, Pa., assign or to American Viscose Corporation, Wilmington, Del., a corporation of Delaware Application November 5, 1941, Serial No. 417,902

-14 Claims.

Tins invention relates to devices for retaining covers on spinning buckets employed in collecting threads, such as of, freshly spun artificial silk made from viscose.

It is an object of the means on the cover, normally positioned within the periphery of the cover:

adapted to be thrown outwardly to engage the rim of the spinning bucket during rotation thereof and to be. returned to normal position upon slowing down of the rotation of the bucket so that the cover may be readily removed and replaced on the bucket; It is a further object to provide such means as are of relatively small size compared to the periphery of the cover to'reduce to a m um any tendency of the movable parts to stick in either the normal or cover-engaging positions as a result of either adhesive or frictional forces.

In the drawing, illustrative of the invention,

Figure 1 shows a plan view of a spinning bucket with the cover in place,

Figure 2'is a perspective view of the cover of Figure 1 partly in cross-section and partially broken away, p J

Figure 3 is an ele ational cross-section of the spinning bucket ofFigure 1 with cover in place partially broken away,

Figure 4 is a perspective view similar to Figure 2 butshowing a modified form of invention, and

Figure 51:; a perspective view similar to Figure 2 but showing ventilm.

Figure 6 is a plan view of a modification.

Referring first to'Flgures 1 to 3 inclusive of the drawing, there is shown a spinning bucket 2 g in place. The cover is provided. with the central opening 4 customary in such. devices to permit the traversing of a thread-guidwith a cover 3 ing funnel therethrough. The spinning bucket 2 may be of any conventionalconstruction and may be provided with the usual perforations to permit discharge of fluids introduced by the thread wound in the bucket by centrifugal force, one shown at 5. As shown in Figures 1 to 3, the inner periphery ofthe spinning bucket is provided with a cover-retaining ledge 9. Alternatively, the cover itself may be provided with an overhanging flange at the top thereof which would permit proper seating of the cover upon the top edge of the spinning bucket.

In accordance with the invention, the cover is provided with a plurality of finger-like elements adapted to serve as cover-locking means. While any numberof such elements may be employed in invention to provide a second modification of the inaccordance with the invention, three are shown in the drawing, and for thepurpose of simplifying the description, only one of such elements will be described hereinafter since all'of them in a given embodiment are identical.

In the embodiment of Figures 1 to 3, afingerlike member 1 is supported upon the cover for swinging motion about the pivot 8. The member 1 is provided with a resilient tail portion 9 which normally restrains the finger-like member to the position shown in Figure 2 wherein the member 1 is confined within the limits of the periphery of the cover, this limiting position being controlled by the abutment I9 against which the end of thetail 9 rests. The construction of the finger-like member 1 is such that one end H, herein designated the cover-engaging end, is considerably heavier than the tail 9. As a result of this fact, upon rotation of the spinning bucket at high speeds the bucket-engaging end is thrown outwardly by centrifugal force against the resiliof the spring tail 9, thereby'locking the cover in position upon rotation of the spinning bucket. Because of the'resilient character of the tail 9, the member 1 is retiu'ned to the position shown in Figure 2 upon slowing down of subjecting the cover-locking means to severe mechanical action. As shown in' the drawing, the area of the bucket engaging surface of thefingerlike member is relatively-gsmall as comparedto the total periphery of the coverthereby reducing to a minimum any tendency of the bucket-"engaging surface to adhereto the spinning bucket. In addition, the horizontal surfaces of the fingerlike member which mustslideralongadiacent horizontal surfaces of-the' cover duringdperation to bucket-engaging position and back to normal position are relatively small as compared to the periphery of the cover and as effective weight of the bucket-engaging end thereof. This serves to minimize the amount of friction opposing the centrifugal motion or return to normal position of the finger-like mem-. her 1.

The bucket-engaging end member I may be-formed with a beveled surface as shown at l2 to facilitate afirm engagement and rapid disengagement'of the locking element with the groove ill on the inside of the bucket rim, the groove being beveled to conform with the bucket-engaging member.. The groove "I:

compared to the of the finger-like may extend annularly along the entire inner periphery of the bucket rim or, as is shown in Figure 5, it may have a relatively short length, having however a sufliciently greater length than the bucket-engaging portion of the finger-like member to facilitate insertion of the cover in the proper position relative to the grooves in the bucket without the necessity of exercising great care in obtaining accurate register.

In the modification shown in Figure 4, the finger-like member 1 is pivoted at l and has a non-resilient tall I! of less weight than the bucket-engaging end II. The tail ll bears against a leaf-spring element is bent in the shape of a U and confined between the tall I and the recess surface It within the cover. As in Figures 1 to 3, the embodiment of Figure 4 is normally in the position shown, the end ll of the finger-like member 'I being thrown into bucket-engaging position upon rotation of the box and being returned to normal position by the spring I! upon stopping thereof.

In the embodiment of Figure 5, the finger-like member I is similar in construction to that of Figure 4, but the spring I! of Figure 4 is replaced by the resilient cushion H, which may be of rubber, sponge rubber, synthetic rubber, or synthetic rubber sponge. As in the other embodiments, the embodiment of Figure 5 is held in the normal position within the limits of the periphery of the cover but upon rotation the heavy end ii is thrown outwardly into bucket-engaging position and upon stopping the rotation, the resilient cushion ll returns the finger-like member to normal position.

Where a groove of short length is provided within the inner periphery of the bucket rim, as is shown in Figure 5, a register mark it may be provided at the proper position along the bucket rim so that an operator in placing the cover in position may place the cover with the pivot 8 in substantial alignment with the register'mark ii. If desired,

a separate register mark may be placed upon the.

cover to correspond with the register mark upon the bucket. As stated above, the groove is should be made considerably longer than the bucketengag g portion I! of the finger-"like member I so that an operator need not exercise great care in getting proper register.

In the embodiment of Figure 6, the bucket cover is provided with a plurality of recesses in its periphery as in the preceding embodiments. Each of the recesses is provided with the locking member I! having a beveled groove-engaging surface 20 andtwo oppositely arranged hook-like projections 2| and 22 at its inner end. The member I9 is provided with a centrally disposed guiding slot 23 which cooperates with a pin 24, extending through the recess. A leaf spring 25' is confined between the ends of the hook-like proiections 2| and 22 and the pin 23 in such a man ner that the member I! is normally held in the retracted position within the recess as shown, but upon rotation of the bucket and cover, member I! is thrown outwardly by centrifugal force into engagement with the groove in the bucket. Pref erably the member I9 is so constructed that it is symmetrical and has its center of gravity between the pin and the bucket-engaging surface 20 so that as the member is thrown outwardly, there will be tendency to set up a moment opposing any inequality in the arms of the leaf springs which might cause the member 18 to jam against the end wall of the recess. In this embodiment as well as that of Figure 4, the spring may be made of corrosion-resistant metal or of ordinary steel covered with a tough corrosion-resistant coating of rubber or of a synthetic rubber or resin, such as polyvinyl chloride. Besides having all the advantages of the other embodiments, that of Figure 6 also has the advantage that the ratio of bucket-engaging surface to the frictional sliding surfaces is much greater.

As shown in the drawing, the elements of the cover-locking means are all recessed in the cover, but this is not essential. For example, they may be pivoted upon the top surface of the cover which may be supplied with suitable abutments against which the resilient means may bear. However, the recessed form is preferred because of the fact that it confines the cover-locking elements in a neat fashion, thereby protecting the elements of the mechanism from damage resulting from any possible catching of the cover-locking means during handling of the cover and also protects the hands of operators from injuries that might resuit from careless manipulation of the cover before the spinning bucket has stopped rotation or even after such stopping of rotation.

In general, the devices of the invention are characterized by relatively small areas presenting frictional resistance to motion and relatively small areas presenting the opportunity of sticking of the locking elements in bucket-engaging position even after stopping of rotation. The invention is also characterized by relatively few projecting parts, and in the preferred embodiment by absolute freedom from projecting parts and with absolute assurance that the cover may be removed and repiaced'upon the box without any mechanical wear and tear. The yarious parts of the bucket and cover may be made of the usual corrosion resistant materials employed in making similar structures heretofore.

While preferred embodiments of the invention have been disclosed, the description is intended to be illustrative only, and it is to be understood that changes and variations may be made without departing from the spirit or scope of the invention as defined by the appended claims.

What I claim is:

1. A spinning buckiet adapted to receive a cover, a cover therefor carrying symmetrically disposed thereon a plurality of locking means.

normally retained within the limits defined by the periphery of the cover and adapted to be thrown outwardly into engagement with the bucket upon rotation thereof, and resilient means for opposing said outward movement but of insufiicient strength to overcome it, said resilient means being capable of returning the locking means to normal position upon the slowing of the rotation of the bucket in stopping.

2. A spinning bucket adapted to receive a cover and having a groove on its upper rim, finger-like members pivoted on the cover at points considerably ofi'set'from their respective centers of gravity and normally held out bucket-engaging position but capable of being thrown into engagement with the groove on the bucket upon rotation thereof, resilient means for opposing said motion but of insufficient magnitude to overcome it, said resilient means being capable of returning said members to their normal position upon the slowing of the rotation of the bucket in stopping.

3. A spinning bucket adapted to receive a cover, a cover therefor carrying a plurality of finger-like members pivoted thereupon and normally disposed within the limits defined by the periphery of the cover, said members being 'tion of the buckets in adapted to be thrown outwardly into engagement with the bucket upon rotation thereof, and resilient means for opposing said outward movement but of insuflicient strength to overcome it, said resilient means being capable of returning the locking means to normal position upon the slowing of the'rdtation of the bucket in stopping.

4. A spinning bucket adapted to receive a cover, a cover therefor carrying a plurality of finger-like members pivoted thereupon and nor mally disposed within the limits defined by the periphery of the cover, said members being heavier at one side of their respective pivots and adapted to be thrown outwardly into engagement with the bucket upon rotation thereof, and resilient means on the other side of the pivots for opposing said outward movement but of insufficient strength to overcome it, said resilient means being capable of returning the finger-like members ,to normal position upon the slowing of the rotastopping.

5. A spinning bucket adapted to cover and having a groove on the inside receive a periphery of its upper rim, a cover therefor carrying a plu-- rality of finger-like members pivoted thereon and normally disposed within the limits defined by the periphery of the cover,- said members being heavier at one side of their respective pivots and adapted to be thrown outwardly into engagement with the groove in the bucket upon rotation thereof, and resilient means for-opposing said outward movement but of insufficient strength to overcome it, said resilient means being capable of returning the finger-like members to normal position upon the slowing of the rotation of the bucket in stopping.

6. A spinning bucket adapted to receive a cover groove on the inside periphery of and having a e upper rim thereof, a cover therefor carrying a plurality of finger-like members pivoted thereon and normally disposed within the limits defined by the periphery of the cover, said members being heavier at one side of their respective pivots and adapted to be thrown outwardly into engagement with the groove in the bucket upon rotation thereof, and resilient means on the other side of the pivots for opposing said outward movement but of insuflicient strength to overcome it, said resilient means being capable of re? turning the finger-like members to normal position upon the slowing of the rotation of the bucket in stopping.

7. A spinning bucket adapted to receive a cover and having on the inside periphery of its upper rim a groove having sloping sides diminishing its width with increasing depth, a cover therefor carrying a plurality of finger-like members piv- 2,308,882 I heavier at one side of their respective pivots and by the periphery of the cover, said members being heavier at one side of their respective pivots and adapted to be thrown outwardly into engagement with the bucket upon rotation thereof, and resilient means for opposing said outward movement but oi insuii'ieient strength to overcome it, said resilient means being capable of returning the members to normal position upon the slowing of the rotation of the bucket in stopping.

9. A sp nning bucket adapted to receive a cover, a cover therefor carrying symmetrically disposed thereon a plurality of locking means normally retained within the-limits'defined by the periphery of the cover and adapted to be thrown out oted thereon and normally disposed within the limits defined by the periphery of the cover, said members having bucket-engaging projections on their heavier ends with relation to their respec- 4 of insufficient strength to that its center to prevent any wardly into engagement withthe bucket upon rotation thereof, said locking means extending along but a relatively small proportion of the periphery of the cover whereby frictional and adhesive focus tending inward movement of said means are minimized, and resilient means for opposing said outward movement but of insufllcient strength to overcome it, said resilient means being capable of returning the locking means to normal position upon the slowing of the rotation of the bucket in stopping.

10. A spinning bucket adapted totreceive a cover, a cover therefor carrying a plurality of locking members radially slidable with respect thereto and normally disposed within the limits defined by the periphery ofvthe cover, and resilient means for opposing said radial movement outwardly but of insuflicient strength toovercome such movement upon rotation of the bucket,.said resilient means locking means to normal position upon the slowing of the rotation of the bucket in stopping.

11. A spinning bucket adapted to receive a cover, a cover therefor carrying a plurality of members slidable radially with respect thereto and normally disposed within the limits defined by the periphery of the cover, a pin disposed in in its norm-a1 retracted position and tending to oppose outward movement thereof but insuilicient to overcome outward movement upon rotation of the bucket.

12. A spinning bucket adapted to receive a cover, a cover therefor carrying a plurality of locking members slidable radially with respect thereto and normally disposed within the limits defined by the periphery of the cover, a pin disposed in said cover on a radial line extending substantially centrally of each of said locking members, a guideway in each of said locking members adapted to cooperate with each of said pins, resilient means on each of said locking members bearing against said pin normally retaining said member in its normal retracted position and opposing outward movement thereof but with insuflicient force to overcome such outward movement upon rotation ofthe spinning bucket. each of said locking members being so constructed of gravity lies outwardly with respect to each of said pins when said locking members lie in normal position so that outward movement thereof against the opposing action of the resilient means is accompanied with a tendency binding members in said cover.

13. A spinning bucket adapted to receive a cover and having a groove on the inside of its to oppose outward and being capable of returning the action of said locking upper rim, a cover therefor carrying recessed therein a plurality of locking members slidable radially with respect thereto into and out of en- ,g'agement with said groove and normally disposed within the limits defined by the periphery of the ward movement upon rotation of the spinning bucket, each of said locking members being so constructed that itscenter of gravity lies outwardly with respect to each of said pins when aaoaeea said locking members lie in normal position so that outward movement thereof against the opposing actionof the resilient means is vaccompanied with a tendency to prevent any binding action of said locking members in the recesses in said cover. 4 a

14. A spinning bucket adapted to receive a cover, a cover therefor carrying thereon locking means normally retained within the limits defined by the periphery of the cover and adapted to be thrown outwardly intoengagement with the bucket upon rotation thereof, and resilient means for opposing said outward movement but of insumcient strength toovercome it, said resilient means being capable of returning the locking means to normal position upon the slowing of the rotation of the bucket in stopping.

HENRY J. MCDERMOTT. 

